Plzzz
here is a sequence 2, 2sqrt(7) ,14, 14sqrt(7)

a) work out the next term .
b) find the nth term
c) find the value of the 21st term divided by the 17th term .

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.  

a - base

b - exponent

so,